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Jumper Settings
3-6
3.2 Jumper Settings
There are two jumpers on the EVM.
- JP1 is used to select the communication mode of the EVM. Position 1–2
sets the mode for SPI. Position 2–3 sets the mode for I
2
C. The GUI
software was developed for I
2
C communication. For SPI the end-user
needs to create the necessary code. Signals needed for SPI are available
on the EVM.
- JP2 is used to select or deselect the onboard crystal for MASTER CLOCK.
Choose one of the following jumper configurations before applying power to
the EVM:
MASTER CLOCK SOURCE JP2 Y1
Master clock from onboard crystal OUT IN
Master clock supplied externally IN OUT
3.3 TLV320AIC23 EVM2 Power
The TLV320AIC23 EVM2 is powered by an external 5-Vdc power supply (not
included) to a 2,5-mm mini power jack, PJ1. LED1 indicates when power is
applied to the board.
3.4 Analog Connections
3.4.1 Microphone
A 3,5-mm mono jack is available for the microphone input, J3.
3.4.2 LINE IN Connections
A 1.0-V rms (max) input is available at the LINE IN jacks. Two connection types
are available.
- Independent left/right RCA jacks, J1L and J1R.
- 3,5-mm stereo mini jack, J1.
3.4.3 Headphones
A headphone connection is available at J4 for 16- or 32-Ω loads. J4 is a
3,5-mm stereo mini jack.
3.4.4 LINE OUT Connectors
A 1.0-V rms (max) output is available at the LINE OUT jacks. Two connection
types are available.
- Independent left/right RCA jacks, J2L and J2R.
- 3,5-mm stereo mini jack, J2.